Barnes & Noble may have saved most of the limelight today for in-app purchasing on Nook hardware, but it's not leaving other platforms by the wayside. Its Nook 3.4 update for iOS focuses heavily on visuals, with new support for both Nook Comics as well as "HD" magazines on Retina display-equipped iPads. Likewise, there's some spring cleaning afoot: the app offers better organization for periodicals, the option to expand book illustrations and newly animated page turns. Swi
